## Search

Now showing items 1-10 of 64

#### Mass, entropy, and holography in asymptotically de Sitter spaces

(American Physical Society, 2002-06-15)

We propose a novel prescription for computing the boundary stress tensor and charges of asymptotically de Sitter (dS) spacetimes from data at early or late time infinity. If there is a holographic dual to dS spaces, defined ...

#### Notes on spacetime thermodynamics and the observer dependence of entropy

(American Physical Society, 2004-03)

Because of the Unruh effect, accelerated and inertial observers differ in their description of a given quantum state. The implications of this effect are explored for the entropy assigned by such observers to localized ...

#### Relating the cosmological constant and supersymmetry breaking in warped compactifications of IIB string theory

(American Physical Society, 2003-02-15)

It has been suggested that the observed value of the cosmological constant is related to the supersymmetry breaking scale M-susy through the formula Lambdasimilar toM(p)(4)(M-susy/M-p)(8). We point out that a similar ...

#### Constraints on gauged B-3L(tau) and related theories

(American Physical Society, 2001-04-01)

We consider extensions of the standard model with an extra U(1) gauge boson that couples to B- (alphaL(e), + betaL(mu) + gammaL(tau)) with alpha + beta + gamma =3. We show that the extra gauge boson necessarily mixes with ...

#### Background independent quantum mechanics and gravity

(American Physical Society, 2003-09-15)

We argue that the demand of background independence in a quantum theory of gravity calls for an extension of standard geometric quantum mechanics. We discuss a possible kinematical and dynamical generalization of the latter ...

#### Constraints on two-Higgs-doublet models at large tan beta from W and Z decays

(American Physical Society, 2000-09-01)

We study constraints on type-II two-Higgs-doublet models at large tan beta from CERN LEP and SLD Z-pole data and from lepton universality violation in W decay. We perform a global fit and find that, in the context of Z ...

#### Short distance versus long distance physics: The classical limit of the minimal length uncertainty relation

(American Physical Society, 2002-07-15)

We continue our investigation of the phenomenological implications of the "deformed" commutation relations [(x) over cap (i),(p) over cap (j)]=i (h) over bar[(1+beta(p) over cap (2))delta(ij)+beta'(p) over cap (i)(p) over ...

#### Glueball spectrum of pure Yang-Mills theory in 2+1 dimensions

(American Physical Society, 2007-09)

We present details of the analytic computation of the spectrum of lowest spin glueballs in pure Yang-Mills theory in 2+1 dimensions. The new ingredient is provided by the conjectured new nontrivial expression for the ...

#### Monte Carlo simulation calculation of the critical coupling constant for two-dimensional continuum phi(4) theory

(American Physical Society, 1998-10)

We perform a Monte Carlo simulation calculation of the critical coupling constant for the continuum two-dimensional (lambda/4) phi(4) theory. The critical coupling constant we obtain is [lambda/mu(2)](crit) = 10.26(-.04)(+.08). ...

#### Quantum gravity, torsion, parity violation, and all that

(American Physical Society, 2005-11)

We discuss the issue of parity violation in quantum gravity. In particular, we study the coupling of fermionic degrees of freedom in the presence of torsion and the physical meaning of the Immirzi parameter from the viewpoint ...